The Renault M9R 808 is a 2,188 cc, inline‑four turbo‑diesel engine produced between 2006 and 2018. Developed jointly with Nissan, it features a DOHC 16‑valve layout, common rail direct injection, and a variable geometry turbocharger (VGT). Output ranges from 110 kW (150 PS) to 130 kW (177 PS), with torque figures between 340–380 Nm, providing strong pulling power for larger vehicles.
Fitted to models like the Espace IV, Laguna III, and Master van, the M9R 808 was engineere…
Production years 2006–2010 meet Euro 4 standards; 2011–2018 models meet Euro 5 compliance .
The Renault M9R 808 is a 2,188 cc inline‑four turbo‑diesel engineered for MPVs, estates, and light commercial vehicles (2006-2018). It combines common‑rail direct injection with a single variable‑geometry turbocharger to deliver strong low‑end torque and smooth cruising. Designed to meet Euro 4 and Euro 5 standards, it balances load-carrying performance with fuel economy.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,188 cc | |
Fuel type | Diesel | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 88.0 mm × 90.0 mm | |
Power output | 110–130 kW (150–177 PS) | |
Torque | 340–380 Nm @ 1,500–2,750 rpm | |
Fuel system | Bosch CP1/CP4 common‑rail (up to 1,600 bar) | |
Emissions standard | Euro 4 (2006-2010); Euro 5 (2011-2018) | |
Compression ratio | 15.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single variable‑geometry turbo (Garrett) | |
Timing system | Chain (front‑mounted) | |
Oil type | Renault RN0710 (SAE 5W‑30) | |
Dry weight | 185 kg |
The Renault M9R 808 was used across Renault's MPV and LCV platforms with longitudinal mounting and co-developed with Nissan for shared applications. This engine received platform-specific adaptations-reinforced sump in the Master for commercial use and specific ECU mappings for the Espace-and from 2011 received updates for Euro 5 compliance, including revised EGR coolers. All adaptations are documented in OEM technical bulletins.
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Field reports and technical service bulletins highlight component wear patterns under high-load operation. Adherence to manufacturer service intervals and approved fluid specifications is critical for long-term reliability.
Analysis derived from manufacturer technical service bulletins and industry workshop records. Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The M9R 808 is generally robust with strong torque, but its long-term reliability hinges on strict maintenance. The high-pressure fuel pump is a known weak point if incorrect oil (non-RN0710) or extended intervals are used. Adhering to the 20,000 km service schedule with the correct 5W-30 oil significantly improves longevity and prevents major failures.
The most frequent issues are high-pressure fuel pump failures (linked to oil/service neglect), EGR valve and cooler clogging (causing rough running), DPF regeneration problems (leading to limp mode), and turbo actuator faults (resulting in boost issues). These are well-documented in Renault service bulletins like TN 6014A.
The M9R 808 was primarily used in the Renault Espace IV (dCi 150/175), Laguna III (dCi 150/175), and Master van (dCi 150) from 2006 to 2018. It was also shared with Nissan, powering the Navara D40 pickup (2.5 dCi) from 2007 to 2014, showcasing its joint development.
Aftermarket ECU tuning is common on the M9R-808 platform, but increasing boost or altering engine parameters accelerates component wear, impacts emissions compliance, and may void vehicle warranties. Any modifications should be evaluated carefully by a qualified specialist.
Fuel economy is respectable for its size. In an Espace IV dCi 150, expect around 7.5 L/100km (38 mpg UK) in mixed driving. The heavier Master van will be closer to 8.5-9.0 L/100km (33-31 mpg UK). Highway cruising can yield figures as low as 6.0 L/100km (47 mpg UK). Real-world economy depends heavily on load and driving style.
Yes. The M9R 808 is an interference engine. If the timing chain were to fail or jump significantly, the pistons would collide with the open valves, causing catastrophic internal engine damage. Fortunately, the front-mounted timing chain is generally very durable with proper oil changes.
Renault mandates the use of 5W-30 synthetic oil meeting the RN0710 specification. This is non-negotiable for protecting the high-pressure fuel pump and turbocharger. Using the correct oil and changing it every 20,000 km (or 12 months) is the single most important factor in ensuring the engine's long-term health.
Comprehensive technical documentation and regulatory references
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Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
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